1//===-- aeabi_dcmp.S - EABI dcmp* implementation ---------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "../assembly.h"
10
11// int __aeabi_dcmp{eq,lt,le,ge,gt}(double a, double b) {
12// int result = __{eq,lt,le,ge,gt}df2(a, b);
13// if (result {==,<,<=,>=,>} 0) {
14// return 1;
15// } else {
16// return 0;
17// }
18// }
19
20#if defined(COMPILER_RT_ARMHF_TARGET)
21# define CONVERT_DCMP_ARGS_TO_DF2_ARGS \
22 vmov d0, r0, r1 SEPARATOR \
23 vmov d1, r2, r3
24#else
25# define CONVERT_DCMP_ARGS_TO_DF2_ARGS
26#endif
27
28#define DEFINE_AEABI_DCMP(cond) \
29 .syntax unified SEPARATOR \
30 .p2align 2 SEPARATOR \
31DEFINE_COMPILERRT_FUNCTION(__aeabi_dcmp ## cond) \
32 push { r4, lr } SEPARATOR \
33 CONVERT_DCMP_ARGS_TO_DF2_ARGS SEPARATOR \
34 bl SYMBOL_NAME(__ ## cond ## df2) SEPARATOR \
35 cmp r0, #0 SEPARATOR \
36 b ## cond 1f SEPARATOR \
37 movs r0, #0 SEPARATOR \
38 pop { r4, pc } SEPARATOR \
391: SEPARATOR \
40 movs r0, #1 SEPARATOR \
41 pop { r4, pc } SEPARATOR \
42END_COMPILERRT_FUNCTION(__aeabi_dcmp ## cond)
43
44DEFINE_AEABI_DCMP(eq)
45DEFINE_AEABI_DCMP(lt)
46DEFINE_AEABI_DCMP(le)
47DEFINE_AEABI_DCMP(ge)
48DEFINE_AEABI_DCMP(gt)
49
50NO_EXEC_STACK_DIRECTIVE
51
52

source code of compiler-rt/lib/builtins/arm/aeabi_dcmp.S